/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.eventmesh.common.file;

/**
 * Users can register {@link FileChangeListener} with WatchFileManager via the {@link WatchFileManager#registerFileChangeListener(java.lang.String,
 * org.apache.eventmesh.common.file.FileChangeListener)} method.
 * The {@link FileChangeListener#onChanged(org.apache.eventmesh.common.file.FileChangeContext)}
 * method fires when a file changes, and the {@link FileChangeListener#support(org.apache.eventmesh.common.file.FileChangeContext)} method let the
 * user customize which files are supported
 */
public interface FileChangeListener {

    /**
     * triggered when a file change occurs
     *
     * @param changeContext file change context {@link FileChangeContext}
     */
    void onChanged(FileChangeContext changeContext);

    /**
     * true if support
     *
     * @param changeContext file change context {@link FileChangeContext}
     * @return true if support
     */
    boolean support(FileChangeContext changeContext);
}
